Dual display digital stop watch



FIG. 1 is a top plan view of a dual display digital stop watch showing my new design;

FIG. 2 is a front elevational view;

FIG. 3 is a right side elevational view;

FIG. 4 is a left side elevational view;

FIG. 5 is a rear elevational view;

FIG. 6 is a bottom plan view thereof.

The broken line showings in all figures are environmental only and form no part of the claimed design. 

The ornamental design for a dual display digital stop watch, as shown and described. 